the main products are roots blowers/vacuum pumps of qilu and zhanggu brand(series l, series rr, series 3h and three lobe series ssr), multistage centrifugal blower, regenerative blowers, cement equipment(mechanical vertical kiln, tube mill, rotary drier etc.) and pneumatic conveying systems such as rotary feeder(airlock), diverter valve. the company also produces agricultural machinery(corn combine, wheat-straw trusser, straw gasification system), oil jack and high quality casting etc. the company is capable of designing and producing different kinds of roots blowers for various industries and different kinds of media, and it is the roots blower manufacturer with the largest production scale and the most advanced technology in china. our products are widely used in cement industry, chemical industry, chemical fertilizer, iron and steel, power, casting, waste water treatment, aquatic farming, paper-making and pneumatic convening system, etc.